/Engine/Source/Runtime/UMG/Public/Components/WidgetInteractionComponent.h
Gets the list of components to ignore during hit testing. Which is everything that is a parent/sibling of this component that's not a Widget Component. This is so traces don't get blocked by capsules and such around the player.
void GetRelatedComponentsToIgnoreInAutomaticHitTesting ( [TArray](API\Runtime\Core\Containers\TArray)< [UPrimitiveComponent](API\Runtime\Engine\Components\UPrimitiveComponent) * > & IgnorePrimitives ) const